Title Chrysosporium pseudomerdarium Produces Gibberellins and Promotes Plant Growth
Author Muhammad Hamayun1, Sumera Afzal Khan2, Ilyas Iqbal3, Chae-In Na1, Abdul Latif Khan1, Young-Hyun Hwang4, and In-Jung Lee1*
Address 1School of Applied Bioscience, Kyungpook National University, Daegu 702-701, Republic of Korea, 2Centre of Biotechnology and Microbiology, University of Peshawar, Peshawar 25000, Pakistan, 3Department of Botany, University of Malakand, Chakdra 18000, Pakistan, 4Division of Applied Life Science, Gyeongsang National University, Jinju 660-701, Republic of Korea
Bibliography Journal of Microbiology, 47(4),425-430, 2009,
Key Words Chrysosporium pseudomerdarium, gibberellin production, endophytic fungi, soybean, plant growth
Abstract We isolated 10 endophytic fungi from the roots of drought stressed soybean cultivar Hwangkeumkong and bioassyed on waito-c rice and soybean seedlings, in order to identify plant growth-promoting fungi. The fungal isolate D-2-1 provided the best result for plant height and biomass promotion as compared to wild type Gibberella fujikuroi. The D-2-1 culture filtrate (CF) was analyzed for the presence of gibberellins (GAs) and it was observed that all physiologically active GAs, especially gibberellic acid, were present in higher amounts (GA1, 0.24 ng/ml; GA3, 8.99 ng/ml; GA4, 2.58 ng/ml and GA7, 1.39 ng/ml) in conjunction with physiologically inactive GA5, GA9, GA15, GA19, and GA24. The fungal isolate D-2-1 was identified as a new strain of Chrysosporium pseudomerdarium through phylogenetic analysis of 18S rDNA sequence. Plant growth promotion and GAs production capacity of genus Chrysosporium have been reported for the first time in this study.